<?php
/*
Plugin Name: RSS Backend
Plugin URI: http://enano.homelinux.org/Feed_me
Description: Provides the page Special:RSS, which is used to generate RSS feeds of site and page content changes.
Author: Dan Fuhry
Version: 1.0
Author URI: http://enano.homelinux.org/
*/
/*
* Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
* Version 1.0 release candidate 2
* Copyright (C) 2006-2007 Dan Fuhry
*
* This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
*/
global $db, $session, $paths, $template, $plugins; // Common objects
$plugins->attachHook('base_classes_initted', '
$paths->add_page(Array(
\'name\'=>\'RSS Feed - Latest changes\',
\'urlname\'=>\'RSS\',
\'namespace\'=>\'Special\',
\'special\'=>0,\'visible\'=>0,\'comments_on\'=>0,\'protected\'=>1,\'delvotes\'=>0,\'delvote_ips\'=>\'\',
));
');
$plugins->attachHook('session_started', '__enanoRSSAttachHTMLHeaders();');
function __enanoRSSAttachHTMLHeaders()
{
global $db, $session, $paths, $template, $plugins; // Common objects
$template->add_header('<link rel="alternate" title="'.getConfig('site_name').' Changes feed" href="'.makeUrlNS('Special', 'RSS/recent', null, true).'" type="application/rss+xml" />');
$template->add_header('<link rel="alternate" title="'.getConfig('site_name').' Comments feed" href="'.makeUrlNS('Special', 'RSS/comments', null, true).'" type="application/rss+xml" />');
}
define('ENANO_FEEDBURNER_INCLUDED', true);
/**
* Class for easily generating RSS feeds.
* @package Enano
* @subpackage Feed Me
* @license GNU General Public License <http://www.gnu.org/licenses/gpl.html>
*/
class RSS
{
/**
* List of channels contained in this feed.
* @var array
*/
var $channels = Array();
/**
* The channel that's currently being operated on
* @var array
*/
var $this_channel = Array();
/**
* GUID of the current channel
* @var string
*/
var $this_guid = '';
/**
* List of fully XML-formatted feed entries.
* @var array
*/
var $items = Array();
/**
* Constructor.
* @param string Feed title
* @param string Feed description
* @param string Linkback
* @param string Generator
* @param string E-mail of webmaster
*/
function __construct($title = false, $desc = false, $link = false, $gen = false, $email = false)
{
$this->create_channel($title, $desc, $link, $gen, $email);
}
/**
* PHP 4 constructor.
*/
function RSS($title = false, $desc = false, $link = false, $gen = false, $email = false)
{
$this->__construct($title, $desc, $link, $gen, $email);
}
/**
* Creates a new channel.
*/
function create_channel($title = false, $desc = false, $link = false, $gen = false, $email = false)
{
if ( empty($title) )
$title = 'Untitled feed';
else
$title = htmlspecialchars($title);
if ( empty($desc) )
$desc = 'Test feed';
else
$desc = htmlspecialchars($desc);
if ( empty($link) )
$link = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . scriptPath . '/';
else
$link = htmlspecialchars($link);
if ( !empty($gen) )
$gen = htmlspecialchars($gen);
else
$gen = 'Enano CMS ' . enano_version();
if ( !empty($email) )
$email = htmlspecialchars($email);
else
$email = getConfig('contact_email');
$this->channels = Array();
$guid = md5(microtime() . mt_rand());
$this->channels[$guid] = Array(
'title' => $title,
'link' => $link,
'gen' => $gen,
'email' => $email,
'lang' => 'en-us',
'items' => Array()
);
$this->this_channel =& $this->channels[$guid];
$this->this_guid = $guid;
return $guid;
}
/**
* Selects a specific channel to add items to
* @param string The GUID of the channel
*/
function select_channel($guid)
{
if ( isset($this->channels[$guid]) )
{
$this->this_channel =& $this->channels[$guid];
$this->guid = $guid;
}
}
/**
* Adds a news item.
* @param string Title of the feed entry
* @param string Link to where more information can be found
* @param string Short description or content area
* @param string Date the item was published. If this is a UNIX timestamp it will be formatted with date().
* @param string A Globally-Unique Identifier (GUID) for this item. Doesn't have to be a 128-bit hash - usually it's a link. If one is not provided, one is generated based on the first three parameters.
*/
function add_item($title, $link, $desc, $pubdate, $guid = false)
{
$title = htmlspecialchars($title);
$link = htmlspecialchars($link);
$desc = '<![CDATA[ ' . str_replace(']]>', ']]>', $desc) . ']]>';
if ( is_int($pubdate) || ( !is_int($pub_date) && preg_match('/^([0-9]+)$/', $pubdate) ) )
{
$pubdate = date('D, d M Y H:i:s T', intval($pubdate));
}
if ( !$guid )
{
$guid = md5 ( $title . $link . $desc . $pubdate );
$sec1 = substr($guid, 0, 8);
$sec2 = substr($guid, 8, 4);
$sec3 = substr($guid, 12, 4);
$sec4 = substr($guid, 16, 4);
$sec5 = substr($guid, 20, 12);
$guid = sprintf('%s-%s-%s-%s-%s', $sec1, $sec2, $sec3, $sec4, $sec5);
}
$xml = " <item>
<title>$title</title>
<link>$link</link>
<description>
$desc
</description>
<pubDate>$pubdate</pubDate>
<guid>$guid</guid>
</item>";
$this->this_channel['items'][] = $xml;
}
/**
* Converts everything into the final RSS feed.
* @param bool If true, XML headers ("<?xml version="1.0" encoding="utf-8" ?>") are included. Defaults to true.
* @return string
*/
function render($headers = true)
{
$xml = '';
if ( $headers )
// The weird quotes are because of a jEdit syntax highlighting bug
$xml .= "<?xml version=".'"'."1.0".'"'." encoding=".'"'."utf-8".'"'." ?>\n";
$xml .= "<rss version=".'"'."2.0".'"'.">\n";
foreach ( $this->channels as $channel )
{
$xml .= " <channel>
<title>{$channel['title']}</title>
<link>{$channel['link']}</link>
<description>{$channel['desc']}</description>
<generator>{$channel['gen']}</generator>
<webMaster>{$channel['email']}</webMaster>
<language>{$channel['lang']}</language>
";
$content = implode("\n", $channel['items']) . "\n";
$xml .= $content;
$xml .= " </channel>";
$xml .= "
</rss>";
}
return $xml;
}
}
// function names are IMPORTANT!!! The name pattern is: page_<namespace ID>_<page URLname, without namespace>
function page_Special_RSS() {
global $db, $session, $paths, $template, $plugins; // Common objects
header('Content-type: text/xml; charset=windows-1252'); //application/rss+xml');
$mode = $paths->getParam(0);
$n = $paths->getParam(1);
if(!preg_match('#^([0-9]+)$#', $n) || (int)$n > 50) $n = 20;
else $n = (int)$n;
switch($mode)
{
case "recent":
case false:
$title = getConfig('site_name') . ' Recent Changes';
$desc = getConfig('site_desc');
$rss = new RSS($title, $desc);
$q = $db->sql_query('SELECT * FROM '.table_prefix.'logs WHERE log_type=\'page\' ORDER BY time_id DESC LIMIT '.$n.';');
if(!$q)
{
$rss->add_item('ERROR', '', 'Error selecting log data: ' . mysql_error() . '', time());
}
else
{
while($row = $db->fetchrow())
{
$link = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . makeUrlNS($row['namespace'], $row['page_id']);
$title = $paths->pages[$paths->nslist[$row['namespace']].$row['page_id']]['name'];
$desc = ( $row['edit_summary'] != '' ) ? $row['edit_summary'] : 'No edit summary given.';
$date = $row['time_id'];
$guid = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . makeUrlNS($row['namespace'], $row['page_id']).'?oldid='.$row['time_id'];
$rss->add_item($title, $link, $desc, $date, $guid);
}
}
echo $rss->render();
break;
case "comments":
$title = getConfig('site_name') . ' Latest Comments';
$desc = getConfig('site_desc');
$rss = new RSS($title, $desc);
$q = $db->sql_query('SELECT * FROM '.table_prefix.'comments ORDER BY time DESC LIMIT '.$n.';');
if(!$q)
{
$rss->add_item('ERROR', '', 'Error selecting log data: ' . mysql_error() . '', time());
}
else
{
$n = $db->numrows();
//echo '<!-- Number of rows: '.$n.' -->'; // ."\n<!-- SQL backtrace: \n\n".$db->sql_backtrace().' -->';
for ( $j = 0; $j < $n; $j++ )
{
$row = $db->fetchrow($q);
if(!is_array($row)) die(__FILE__.':'.__LINE__.' $row is not an array');
$link = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . makeUrlNS($row['namespace'], $row['page_id']).'#comments';
$page = ( isset($paths->pages[$paths->nslist[$row['namespace']].$row['page_id']]) ) ? $paths->pages[$paths->nslist[$row['namespace']].$row['page_id']]['name'] : $paths->nslist[$row['namespace']].$row['page_id'];
$title = $row['subject'] . ': Posted on page "'.$page.'" by user '.$row['name'];
$desc = RenderMan::render($row['comment_data']);
$date = $row['time'];
$guid = 'http' . ( isset($_SERVER['HTTPS']) ? 's' : '' ) . '://'.$_SERVER['HTTP_HOST'] . makeUrlNS($row['namespace'], $row['page_id']).'?do=comments&comment='.$row['time'];
$rss->add_item($title, $link, $desc, $date, $guid);
}
}
echo $rss->render();
break;
default:
$code = $plugins->setHook('feed_me_request');
foreach ( $code as $cmd )
{
eval($cmd);
}
break;
}
}
?>